Add timehashes to nip 52 (#1752)

Co-authored-by: Jon Staab <shtaab@gmail.com>

52.md

@@ -95,6 +95,7 @@ Aside from the common tags, this also takes the following tags:
 * `end` (optional) exclusive end Unix timestamp in seconds. If omitted, the calendar event ends instantaneously.
 * `start_tzid` (optional) time zone of the start timestamp, as defined by the IANA Time Zone Database. e.g., `America/Costa_Rica`
 * `end_tzid` (optional) time zone of the end timestamp, as defined by the IANA Time Zone Database. e.g., `America/Costa_Rica`. If omitted and `start_tzid` is provided, the time zone of the end timestamp is the same as the start timestamp.
+* `D` (required) the day-granularity unix timestamp on which the event takes place, calculated as `floor(unix_seconds() / seconds_in_one_day)`. Multiple tags SHOULD be included to cover the event's timeframe.
 
 ```yaml
 {
@@ -113,6 +114,7 @@ Aside from the common tags, this also takes the following tags:
     // timestamps
     ["start", "<unix timestamp in seconds>"],
     ["end", "<unix timestamp in seconds>"],
+    ["D", "82549"],
 
     ["start_tzid", "<IANA Time Zone Database identifier>"],
     ["end_tzid", "<IANA Time Zone Database identifier>"],
@@ -203,10 +205,6 @@ The list of tags is as follows:
 }
 ```
 
-## Unsolved Limitations
-
-* No private events
-
 ## Intentionally Unsupported Scenarios
 
 ### Recurring Calendar Events

55.md

@@ -249,7 +249,7 @@ launcher.launch(intent)
     ```kotlin
     val intent = Intent(Intent.ACTION_VIEW, Uri.parse("nostrsigner:$encryptedText"))
     intent.`package` = "com.example.signer"
-    intent.putExtra("type", "nip04_decrypt")
+    intent.putExtra("type", "nip44_decrypt")
     // to control the result in your application in case you are not waiting the result before sending another intent
     intent.putExtra("id", "some_id")
     // Send the current logged in user pubkey

README.md

@@ -348,6 +348,7 @@ They exist to document what may be implemented by [Nostr](https://github.com/nos
 | `A`               | root address                         | relay URL                       | [22](22.md)                                        |
 | `c`               | commit id                            |                                 | [34](34.md)                                       |
 | `d`               | identifier                           | --                              | [01](01.md)                                        |
+| `D`               | day                                  | --                              | [52](52.md)                                        |
 | `e`               | event id (hex)                       | relay URL, marker, pubkey (hex) | [01](01.md), [10](10.md)                           |
 | `E`               | root event id                        | relay URL                       | [22](22.md)                                        |
 | `f`               | currency code                        | --                              | [69](69.md)                                        |